Tech Tip: Honda CR-V Rear Brake Grinding, Thumping or Groaning Noises
A customer may complain of a grinding, thumping or groaning noise coming from the rear brakes. This occurs during the first several stops after the vehicle has been parked overnight. Under normal braking, corrosion from the disc surface is not quickly removed, allowing for a temporary grinding or thumping noise. A new brake pad is now available, which has improved corrosion-removal characteristics.
Brake Job: 2007 GM Full-Sized 1500 Pick-Up and SUV
The GMT 900 debuted in 2007 as the replacement for the GMT 800. The first GMT 900 vehicle was the Chevrolet Tahoe, which arrived at dealers in January 2006. The GMC Yukon (regular and Denali) and Cadillac Escalade soon followed. Chevrolet Avalanches and Suburbans, GMC Yukon XLs, and Cadillac Escalade ESV and EXT were next to hit the roads.
Tech Tip: Jaguar Front End Creaks/Knocks on Bumps or Turns
A customer may report a concern of a creak or knocking noise coming from the front of the vehicle when driving over uneven ground or turning a corner. The noise may be emanating from the front left-hand side of the vehicle.
ASE-Certified Technician in Oklahoma Reports Seeing More Vehicles with Rusted Brake Lines
A news story on KJRH-TV Channel 2 in Tulsa, OK, profiled a local driver who experienced a loss of brakes that was attributed to a rusted brake line that snapped. A local ASE-certified technician told the reporter that he is seeing more and more vehicles with rusted brake lines. Are you seeing this same trend at your shop? Let us know.
Latest Toyota Recall Due to Replacement Brake Fluid and OE Seals
Toyota Motor Sales announced it will conduct a voluntary Safety Recall for a brake problem that occurs once the vehicle has been serviced with non-factory fill/genuine brake fluid. Drivers may experience a small amount of the brake fluid leaking from the brake master cylinder, resulting in illumination of the brake warning lamp.
Tech Tip: BMW Brake Pad Warning Light On After Brake Pad Replacement
You may get a customer complaint that the brake pad warning light comes on after the rear brake pads have been replaced. After replacing the pads and wear sensor, turn the ignition on and wait for at least 30 seconds, then start the engine. If the pad wear circuit is good, the light should go out with no further procedures.
Tech Feature: Brake Job on Chrysler Sebring
The Sebring was replaced with a new model based on the JS platform for the 2007 model year. There are several brake packages available featuring either a disc/drum combination or a disc/disc combination. All models are equipped with five possible brake system options.
Tech Tip: How to Bleed Slave Cylinders Without Bleed Screws
Technology is constantly changing and hydraulic release clutch systems are no exception. It is not uncommon for once familiar features to disappear from new vehicle models, replaced by “new and improved” designs. This changing landscape can cause confusion, and occasionally result in damage to system components when technicians mistake new features for old ones. Hydraulic slave cylinders without bleed screws are a perfect example.
BRAKE JOB: Bob on Brakes
Bob Dowie knows brakes. Dowie has been in the automotive service business for more than 30 years, and his shop, Village Auto Works in Chester, NY, specializes in Honda, Toyota, Mazda and Nissan repair. Dowie owns and runs a Honda Civic and Nissan Sentra SER in SCCA GT5 racing, and gets his technicians involved in various aspects of the sport. In this installment of BRAKE JOB, Bob shares some of his best tips for doing as complete brake job.
BRAKE MATH: CALCULATING THE FORCE NEEDED TO STOP A CAR
Harold Unikel of Power Brake X-Change, of Pittsburgh, PA reminded my why it is so important for technicians to be able to understand the brake math basics. I made a mistake while editing the equation for calculating the surface area of a circle which is πR2.
BRAKE MATH: PSI & Clamping Forces What happens in the real world?
In our last installment of Brake Math, we demonstrated how 70 lbs. of force on a brake pedal can result in 556 psi of brake fluid heading to the calipers. So how does this pressure stop a car? Next, we we look at how PSI is turned into “clamping force” and the math behind it. Also, we will look at the implications it has on friction materials and caliper design.
Brake Tech Tip: It May Be Time for a Complete System Flush
With a customer complaint of a fading brake pedal, most technicians automatically assume friction as the culprit. Installing a new or different type of friction formulation may not satisfy the pedal fading symptoms, especially if the brake fluid is contaminated.